let gCubeVertexData: [Float] = [
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    0.5, 0.5, -0.5,         1.0, 0.0, 0.0,
    0.5, -0.5, 0.5,         1.0, 0.0, 0.0,
    0.5, -0.5, 0.5,         1.0, 0.0, 0.0,
    0.5, 0.5, -0.5,          1.0, 0.0, 0.0,
    0.5, 0.5, 0.5,         1.0, 0.0, 0.0,

    0.5, 0.5, -0.5,         0.0, 1.0, 0.0,
    -0.5, 0.5, -0.5,        0.0, 1.0, 0.0,
    0.5, 0.5, 0.5,          0.0, 1.0, 0.0,
    0.5, 0.5, 0.5,          0.0, 1.0, 0.0,
    -0.5, 0.5, -0.5,        0.0, 1.0, 0.0,
    -0.5, 0.5, 0.5,         0.0, 1.0, 0.0,

    -0.5, 0.5, -0.5,        -1.0, 0.0, 0.0,
    -0.5, -0.5, -0.5,       -1.0, 0.0, 0.0,
    -0.5, 0.5, 0.5,         -1.0, 0.0, 0.0,
    -0.5, 0.5, 0.5,         -1.0, 0.0, 0.0,
    -0.5, -0.5, -0.5,       -1.0, 0.0, 0.0,
    -0.5, -0.5, 0.5,        -1.0, 0.0, 0.0,

    -0.5, -0.5, -0.5,       0.0, -1.0, 0.0,
    0.5, -0.5, -0.5,        0.0, -1.0, 0.0,
    -0.5, -0.5, 0.5,        0.0, -1.0, 0.0,
    -0.5, -0.5, 0.5,        0.0, -1.0, 0.0,
    0.5, -0.5, -0.5,        0.0, -1.0, 0.0,
    0.5, -0.5, 0.5,         0.0, -1.0, 0.0,

    0.5, 0.5, 0.5,          0.0, 0.0, 1.0,
    -0.5, 0.5, 0.5,         0.0, 0.0, 1.0,
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    -0.5, 0.5, 0.5,         0.0, 0.0, 1.0,
    -0.5, -0.5, 0.5,        0.0, 0.0, 1.0,

    0.5, -0.5, -0.5,        0.0, 0.0, -1.0,
    -0.5, -0.5, -0.5,       0.0, 0.0, -1.0,
    0.5, 0.5, -0.5,         0.0, 0.0, -1.0,
    0.5, 0.5, -0.5,         0.0, 0.0, -1.0,
    -0.5, -0.5, -0.5,       0.0, 0.0, -1.0,
    -0.5, 0.5, -0.5,        0.0, 0.0, -1.0
]


